| # | |
| # Copyright (c) 2011-2013, ARM Limited. All rights reserved. | |
| # Copyright (c) 2014-2016, Linaro Limited. All rights reserved. | |
| # | |
| # This program and the accompanying materials | |
| # are licensed and made available under the terms and conditions of the BSD License | |
| # which accompanies this distribution. The full text of the license may be found at | |
| # http://opensource.org/licenses/bsd-license.php | |
| # | |
| # THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, | |
| # WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. | |
| # | |
| # | |
| #include <AsmMacroIoLib.h> | |
| #include <Library/ArmLib.h> | |
| ASM_FUNC(ArmPlatformPeiBootAction) | |
| mov r11, r14 // preserve LR | |
| mov r10, r0 // preserve DTB pointer | |
| mov r9, r1 // preserve base of image pointer | |
| // | |
| // If we are booting from RAM using the Linux kernel boot protocol, r0 will | |
| // point to the DTB image in memory. Otherwise, we are just coming out of | |
| // reset, and r0 will be 0. | |
| // | |
| teq r0, #0 | |
| beq .Lout | |
| // | |
| // The base of the runtime image has been preserved in r1. Check whether | |
| // the expected magic number can be found in the header. | |
| // | |
| ldr r8, .LArm32LinuxMagic | |
| ldr r7, [r1, #0x24] | |
| cmp r7, r8 | |
| bne .Lout | |
| // | |
| // | |
| // OK, so far so good. We have confirmed that we likely have a DTB and are | |
| // booting via the ARM Linux boot protocol. Update the base-of-image PCD | |
| // to the actual relocated value, and add the shift of PcdFdBaseAddress to | |
| // PcdFvBaseAddress as well | |
| // | |
| ADRL (r8, PcdGet64 (PcdFdBaseAddress)) | |
| ADRL (r7, PcdGet64 (PcdFvBaseAddress)) | |
| ldr r6, [r8] | |
| ldr r5, [r7] | |
| sub r5, r5, r6 | |
| add r5, r5, r1 | |
| str r1, [r8] | |
| str r5, [r7] | |
| // | |
| // Discover the memory size and offset from the DTB, and record in the | |
| // respective PCDs. This will also return false if a corrupt DTB is | |
| // encountered. Since we are calling a C function, use the window at the | |
| // beginning of the FD image as a temp stack. | |
| // | |
| ADRL (r1, PcdGet64 (PcdSystemMemoryBase)) | |
| ADRL (r2, PcdGet64 (PcdSystemMemorySize)) | |
| mov sp, r5 | |
| bl FindMemnode | |
| teq r0, #0 | |
| beq .Lout | |
| // | |
| // Copy the DTB to the slack space right after the 64 byte arm64/Linux style | |
| // image header at the base of this image (defined in the FDF), and record the | |
| // pointer in PcdDeviceTreeInitialBaseAddress. | |
| // | |
| ADRL (r8, PcdGet64 (PcdDeviceTreeInitialBaseAddress)) | |
| add r9, r9, #0x40 | |
| str r9, [r8] | |
| mov r0, r9 | |
| mov r1, r10 | |
| bl CopyFdt | |
| .Lout: | |
| bx r11 | |
| .LArm32LinuxMagic: | |
| .byte 0x18, 0x28, 0x6f, 0x01 | |
| //UINTN | |
| //ArmPlatformGetPrimaryCoreMpId ( | |
| // VOID | |
| // ); | |
| ASM_FUNC(ArmPlatformGetPrimaryCoreMpId) | |
| MOV32 (r0, FixedPcdGet32 (PcdArmPrimaryCore)) | |
| bx lr | |
| //UINTN | |
| //ArmPlatformIsPrimaryCore ( | |
| // IN UINTN MpId | |
| // ); | |
| ASM_FUNC(ArmPlatformIsPrimaryCore) | |
| mov r0, #1 | |
| bx lr | |
| //UINTN | |
| //ArmPlatformGetCorePosition ( | |
| // IN UINTN MpId | |
| // ); | |
| // With this function: CorePos = (ClusterId * 4) + CoreId | |
| ASM_FUNC(ArmPlatformGetCorePosition) | |
| and r1, r0, #ARM_CORE_MASK | |
| and r0, r0, #ARM_CLUSTER_MASK | |
| add r0, r1, r0, LSR #6 | |
| bx lr | |
| //EFI_PHYSICAL_ADDRESS | |
| //GetPhysAddrTop ( | |
| // VOID | |
| // ); | |
| ASM_FUNC(ArmGetPhysAddrTop) | |
| mov r0, #0x00000000 | |
| mov r1, #0x10000 | |
| bx lr | |